2230. 1973 Kodak Pocket Master Photoguide AR-21 -Excellent Condition Photography Guide. Lots of information for a small book. Please look at the pictures. Always consider offers. This 1973 Kodak Pocket Master Photoguide (AR-21) is a compact and comprehensive vintage photography reference manual, designed to assist with exposure settings, lighting, filters, and film types. Created for both amateur and professional photographers, this guide is a rare collectible from the golden age of analog photography. Perfect for collectors of Kodak memorabilia, vintage photography gear, or anyone interested in classic film shooting techniques. Spiral-bound with sliding adjustment wheels, this guide is a functional piece of photographic history.